Remove keepalive, update the number of FDs available to be twice the number of workers

Author: Rider-Linden

Dockerfile

@@ -16,6 +16,7 @@ ENV STATIC_LOCATIONS=
 ENV NO_ACCESS_LOGS=0
 ENV LOG_ONLY_5XX=0
 ENV WORKER_CONNECTIONS=1024
+
 EXPOSE 80
 STOPSIGNAL SIGQUIT
 ENTRYPOINT ["/docker-entrypoint.sh"]

README.md

@@ -28,6 +28,7 @@ Pair nginx-proxy with your favorite upstream server (wsgi, uwsgi, asgi, et al.)
 | `NO_ACCESS_LOGS` | disable access logs completely | No | 0 | 1 |
 | `LOG_ONLY_5XX` | only log 5XX HTTP status access events | No | 0 | 1 |
 | `WORKER_CONNECTIONS` | Set the number of allowed worker connections | No | 1024 | 2048 |
+| `WORKER_FILE_LIMIT` | Set the number of available file descripters | No | 2*WORKER_CONNECTIONS | 4096 |
 
 ### Hosting Static Assets
 

src/docker-entrypoint.d/00-render-templates.sh

@@ -16,6 +16,8 @@ function render_templates {
   done
 }
 
+export WORKER_FILE_LIMIT=${WORKER_FILE_LIMIT:=$(( WORKER_CONNECTIONS * 2 ))}
+
 render_templates "/etc/nginx/*.template" "/etc/nginx"
 render_templates "/etc/nginx/conf.d/*.template" "/etc/nginx/conf.d"
 render_templates "/etc/nginx/includes/*.template" "/etc/nginx/includes"

src/etc/nginx/conf.d/default.conf.template

@@ -10,8 +10,6 @@ server {
 
 upstream app {
   server {{ .Env.UPSTREAM_SERVER }};
-
-  keepalive 8; # The maximum number of idle keepalive connections to upstream servers.
 }
 
 server {
@@ -24,9 +22,6 @@ server {
   add_header X-XSS-Protection "1; mode=block";
   add_header X-Content-Type-Options "nosniff";
 
-  proxy_http_version 1.1;
-  proxy_set_header "Connection" "";
-
   location / {
     {{ if (eq .Env.PROXY_UWSGI "1") }}
     include /etc/nginx/includes/uwsgi.conf;

src/etc/nginx/nginx.conf.template

@@ -7,6 +7,7 @@ pid        /var/run/nginx.pid;
 # Used to zap Server header
 load_module /usr/lib/nginx/modules/ngx_http_headers_more_filter_module.so;
 
+worker_rlimit_nofile {{ .Env.WORKER_FILE_LIMIT }};
 events {
     worker_connections  {{ .Env.WORKER_CONNECTIONS }};
     use epoll;